The model is delivered in 2 different way.In  the first file named "BM_Tower_model01" the elements that are forming the tower are arranged on layers like this: -layer 1 contains the concrete core , concrete columnsand the slabs -layer 2 contains the glass and the mullions -layer 3 contains the metallic structure from the entrance -layer 4 contains the the exterior structure of the tower layer 5 contains the staircases and handrails layer 20 contains the camera the lights and the ground plane If you are using the Layer manager addon  the layer are also properly named. You can read more about the addon and download from this link: http://blenderartists.org/forum/showthread.php?255225-Addon-Layer-manager-for-Blender-2-63a Materials The scene contains 3 base materials from witch all the materials are made -the first is a paint shader that is based on one diffuse layer and 2 glossy layers. You can change the base color to change the color of the paint, and if you want to change the reflection of the paint play with the roughness and the IOR  of the first and second glossy layer. -the second shader contains a procedural node setup for generating tiles. The shader also contains one  specular layer. You can control the color of the tilling ( or use a image texture) ,the color of the mortar, the scale, width, height and mortar size. The bump texture isgreyscale version of the same texture and you can control the strength of the bump. -the third shader is the glass shader that is a mix of  3 shaders  ( glass, transparent and glossy) The second files contains the tower as single object.

Appending  the tower into a Scene:

1 Open the .blend file of your scene

2 press Shift F1 or File -> Append

3 find this .blend "BM_Tower_model02" and select it

4 go into Object

5 select high_rise_tower

6 press "Link/Append from Library"